This site is supported by donations to The OEIS Foundation.

 Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS". Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A208598 Number of 4-bead necklaces labelled with numbers -n..n not allowing reversal, with sum zero 2
 6, 23, 60, 125, 226, 371, 568, 825, 1150, 1551, 2036, 2613, 3290, 4075, 4976, 6001, 7158, 8455, 9900, 11501, 13266, 15203, 17320, 19625, 22126, 24831, 27748, 30885, 34250, 37851, 41696, 45793, 50150, 54775, 59676, 64861, 70338, 76115, 82200, 88601 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A208597 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = (4/3)*n^3 + 2*n^2 + (5/3)*n + 1 EXAMPLE Some solutions for n=4 .-3...-4...-3...-3...-4...-2...-2...-3...-4...-2...-3...-1...-4...-3...-4...-4 ..1...-2....4....3....0....0....0...-1....1...-2....4...-1....2...-1....1...-1 ..4....2....0...-3....3...-2....0....3....1....4...-1....2...-2....4....0....3 .-2....4...-1....3....1....4....2....1....2....0....0....0....4....0....3....2 CROSSREFS Sequence in context: A273214 A273276 A273252 * A119712 A273314 A281424 Adjacent sequences:  A208595 A208596 A208597 * A208599 A208600 A208601 KEYWORD nonn AUTHOR R. H. Hardin Feb 29 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.